Place a pound of popcorn kernels in a LARGE microwave proof bowl.
Fill the bowl with water.
Cook on high for 1 ½ hours and add more water each half hour.
Drain, cool and pack in small bags and freeze.
Defrost in hot water and feed.

Method #2

Place popcorn kernels in slow cooker. Don't use a non-stick cooker.
Fill slow cooker with water.
Cook on low for about 10 hours.
Drain and cool.